High frequency pulse width modulation

Abstract

An electronic device is provided that achieves a reduction in the amount of unwanted noise produced as a consequence of electrical switching associated with pulse width modulation. The electrical device includes pulse width modulation controls for providing a plurality of settings for operation of the device. The electrical device includes a system for selectively controlling the frequency of the pulse width modulation to provide a desired output operational intensity in response to a known input signal. The system includes a high frequency pulse width modulation signal module adapted to provide frequencies above the audible range of anticipated users of the device, thereby reducing or eliminating the production of unwanted noise associated with the operation of such an electrical device.

Description

[0001] Any references cited hereafter are incorporated by reference to the maximum extent allowable by law. To the extent a reference may not be fully incorporated herein, it is incorporated by reference for background purposes and indicative of the knowledge of one of ordinary skill in the art. BACKGROUND OF THE INVENTION

[0002] 1. Field of the Invention

[0003] The present invention relates generally to the field of noise reduction.

[0004] 2. Description of Related Art

[0005] Excess and unwanted noise has become a problem throughout much of society. Unwanted noise is often found to be distracting, thereby preventing people from giving their full concentration to tasks on which they attempt to keep their attention.

[0006] For example, a person attempting to give full attention to soft sounds such as the soft sounds associated with a quiet scene in a movie would find himself hindered in that regard if the movie could not be played without an associated and distracting unwanted noise ...

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